Steam-boiler.



PATENTED DEC. 6, 1904.

A. G STUGKY.

STEAM BOILER.

APPLIUATION FILED 1130.10, 1903.

N4) MODEL,

INVENTOR: Mum-Q7 By Altomeys,

WITNESSES No. 776,701. PATENTED DEC. 6, 1904:. A. G. STUGKY.

STEAM BOILER.

v APPLIGATION FILED DEU.10, 1903.

N0 MODEL. 2 SHEETS-BREE! 2.

lNYEgTOR: Q/6&m/ 5- WITNESSES: Wm m 7 By Atzameys,

' other embodiment of the invention.

Patented December 6, 1904.

PATENT OEEicE.

ALLAN O. STUOKY, OF SAN ANTONIO, TEXAS.

STEAM-BOILER.

SPECIFICATION forming part of Letters Patent No. 776,701, dated December 6, 1904.

Application filed December 10, 1903. $erial No. 184,693. (No model.)

To all whom it may concern:

- Be it known that I, ALLAN O. STUGKY, a citizen of the United States, residing in San Antonio, in the county of Bexar and State of Texas, haveinvented certain new and useful Improvements in Steam-Boilers, of which the following is a specification.

My invention aims to provide an improvement in steam-boilers which is in some respects a compromise between the ordinary iiretube boilers and the more recent water-tube boilers and which combines certain advantages of both.

The points of novelty are particularly defined in the claims hereinafter.

The accompanying drawings illustrate a boiler embodying my invention.

Figure 1 is a longitudinal section. Fig. 2 is a diagrammatic View of the tubes alone, taken from Fig. 1 and illustrating also an- Fig. 3 is a View showing the side walls in section and the internal parts of the apparatus in elevation. Figs. 4 and 5 are details of joints.

Referring to the accompanying drawings, A and B are respectively the front and rear end walls, and C the side walls.

1) is a furnace from which the products of combustion pass over the bridge E, in the direction of the arrow, to the rear end wall and thence upward through the boiler, emerging finally at the smoke-stack F.

The boiler proper comprises a number of comparatively large tubes arranged in vertical and horizontal rows. The tubes of the first vertical row are letteredGG, &e. Those of the second vertical row are lettered H H, &c., and those of the third row are lettered J J &c. Only three tubes in each vertical and each horizontal row are indicated; but the number within the invention is unlimited. Each alternate tube, commencing with the lowest, G, projects at one end through the front wall A and at its rear end leaves a space along the rear wall B for the passage of the combustion products. Commencing with the second tube, G, each alternate tube projects at one end through the rear wall B and leaves a space adjacent to the front wall A for the passage of the combustion products. Between each two horizontal]y-adjacent tubes, as G I'LG H, &c. there is a diaphragm L, of fire-brick or other refractory material, which deflects heat which would otherwise pass directly up between the tubes. A removable front plate M normally covers the exposed ends of the tubes and the piping hereinafter described. The head N of each of said tubes. which lies outside of the end wall, is detachable, thus permitting a very thorough mechanical cleaning, because one end of each drum is easily accessible, being outside of the boiler-wall and not subject to fire,

and because they expose the entire internal area of the drum. In using larger sizes of tubes I propose also to provide hand-holes O in the exposed ends, which admit of examining the interior of the drums when necessary. The tubes are all substantially identical. The middle tube G of a vertical row typifies the exact style of tube which will be used between the top and bottom tubes. 1 have only illustrated a top, a bottom, and one intermediate tube; but it will be understood that any number of intermediate tubes substantially identical with the tube Gr may be used. This tube lr has upward water-legs P and downward water-legs Q, preferably in line with each other. The top tube has similar downward legs Q, and the bottom tube has similar upward legs P. One set of legs P and Q is near each end of the boiler. These legs are arranged for a quick connection in the position shown. For example, they may be oppositely screw-threaded, so as to be capable of an easy connection by means of a sleeve E, Fig. 5. With this construction it will readily be seen that the boiler may be extended vertically, as indicated in Fig. 3, by disconnecting the upper tube of each row, as G adding onto the tube Gr another tube of identical construction, but reversed right for left, and reconnecting the top tube G onto the new intermediate tube, reversing the tube G also right for left, or any number of tubes may be interposed between the top tube Or and the next lower tube Gr. Preferably the lower tubes are connected to a mud-drum S and the upper tubes are connected to a steam-drum T. The steam-drum, however, is not essential. It may be connected to the upper tubes by means of detachable sleeves R,similar to those connecting the communicating legs between the tubes, and is preferably between the vertical lines of the connecting-legs to facilitate the application of the circulating-pipes W, hereinafter referred to, and to permit access to the same. If the conditions be such as to prevent an extension of the boiler upward, it may be extended laterally, one of the side walls C being moved as indicated in dotted lines in Fig. 3, and an entire additional vertical row of tubes K K, &c., being added. A new and longer steam-drum T will also be needed in such a case.

Preferably at each end of the boiler there is provided a system of pipes U, tapped into the end portions of all the tubes in each vertical row separately. These circulatingpipes are outside of the end walls, so as to be easily accessible. They may be conveniently tapped into the sides of the alternate projecting tube ends and into the heads of the intermediate tube ends, as indicated, or they may lie entirely beyond the ends of the tubes and be tapped into the heads of all of them, as indicated in dotted lines at U in Fig. 2. The feed-pipe V may be arranged as shown or in any other suitable position.

Additional circulating-pipes are preferably provided, extending vertically through the communicating legs P and Q of the several tubes. In order to facilitate the application and withdrawal of these latter circulatingpipes, I use pipes W, which are perforated at the levels of the several tubes and which pass through the top of the uppermost tube and are fastened therein. The method of fastening is illustrated in detail in Fig. 4. The pipe W is provided with an enlarged screwthreaded head X, screwing through the shell of the tube and making it easy to withdraw the pipe, and the pipe is closed by an ordinary plug Y. It is presumed that the water falls in these circulating-pipes IV and rises on the outside of them. It is found in practice that they contribute greatly to the efficiency of the boiler.

The legs P and Q may be formed with integral flanges for connection with the tubes G, as shown in Figs. 1 and 2. I prefer, however, to use the construction shown in detail in Fig. 5,in which P is an ordinary pipe-nipple, While Q is slightly difierent, having a standardlength thread on one end and on the opposite end a thread longer than the combined length of nut R and jam-nut R, and the nipples are screwed at their outer ends onto common stack-nipples, such as Q. Inmakingthe connection the jam-nut R and the nut R are screwed back on the nipple Q. The two nipples are then brought together and the nut screwed tight on the standard thread of the nipple P. The jam-nut R is then screwed down, making an absolutely tight joint.

Though I have described with great particularity of detail a boiler embodying the invention, yet it is to be understood that the invention is not limited to the specific embodiment disclosed. Various modifications thereof may be made by those skilledin the art without departure from the invention.

What I claim is 1. In a steam-boiler, in combination. a number of tubes arranged in a vertical row and staggered endwise, and pipes bringing the end of each of said tubes in communication with the end of the adjacent staggered tube.

2. In asteam-boiler. in combination, a number of tubes arranged in a vertical row and staggered endwise, and pipes bringing the end of each of said tubes in communication with the end of the adjacent staggered tube, said pipes passing through the heads of said tubes.

3. In asteam-boiler, in combination, anumber of tubes arranged in a vertical row and communicating with each other, and internal circulating-pipes passing through the top of the uppermost tube and fastened therein andextencling through the several tubes of the row.

4. In a steam-boiler, in combination, a number of tubes arranged in a vertical row and communicating with each other, and the internal circulating perforated pipe passing through the uppermost tube and fastened therein and extending through the several tubes of the row.

5. In a steam-boiler, in combination, tubes arranged in a vertical row andcommunicating with each other, and internal circulatingpipes passing through the. top of the upper tube.

In witness whereof Ihave hereunto signed my name in the presence of two subscribing witnesses.

ALLAN (J. STUCKY.

I/Vi tnesses:

MosEs W. WHITE, JOHN B. NOLAN. 

